Pregnancy outcomes, such as excessive gestational weight gain and gestational diabetes, are linked to long and short-term maternal and child health. Interventions aimed at improving health behaviors, such as sedentary behavior (SB; i.e., any behavior in a seated or reclining position with low energy expenditure) are attractive because they are low-cost, can be disseminated in a wide variety of populations once pregnancy begins, and do not require drugs or prescriptions. Studies have linked SB to some pregnancy outcomes. To the investigators' knowledge, no studies have tested the efficacy of an intervention to reduce SB in pregnant women. Over 90% of reproductive aged women own a smartphone with similar rates of ownership among black, white, and Hispanic/Latina women, and most adults carry smartphones while awake. Smartphones can monitor SB without additional equipment. Thus, smartphones offer a streamlined opportunity to intervene on SB. The purpose of the research is to evaluate the effectiveness and perception of an mHealth intervention aimed at changing SB in pregnant women. Investigators will survey providers regarding their SB opinions and counseling practices